Retrieving user defined Role name

Is there a System stored procedure that gives me the Role in which a user is in. For example I execute this procedure, give the user as parameter an that gives me back the Role the user is in. It has to be said that this is a user defined role, I got three of them, HR, Employee, Approver.

Greetings,
GodofredoIs it not clear? I just want to retrieve a user defined Role

Greets,
geoff|||I'd use sp_helpuser (http://msdn.microsoft.com/library/en-us/tsqlref/ts_sp_help_45o2.asp).

-PatP